// equalshashcode/Groundhog.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Looks plausible, but doesn't work as a HashMap key

public class Groundhog {
    protected int number;

    public Groundhog(int n) {
        number = n;
    }

    @Override
    public String toString() {
        return "Groundhog #" + number;
    }
}
